Re: Packet Selectors and Packet Information

[Tanja Zseby <zseby@fokus.gmd.de>]

Hi,


Andy Bierman wrote:

> e) Is there any existing publicly available work (e.g. IPFIX) that
>   can be used as-is, or adapted, for PSAMP packet selection? 
Chapter 4 of the IPFIX requirement draft contains a list of  properties 
which a metering process should be able to distinguish for the flow 
classification. In IPFIX these properties are used to assign packets to 
flows. The same properties (maybe extended) could be used for the PSAMP 
filtering process. Furthermore, the configuration of these parameters is 
out of scope for IPFIX. So it would be very useful if PSAMP comes up 
with a scheme to define and configure these parameters which could be 
also used for configuring the IPFIX metering process.

Furthermore, I always saw filtering and sampling as different processes 
for packet selection which could be applied alone or together.
I remember that we discussed the placement of sampling with Sonia when 
we defined the IPFIX metering process (section 2.3) in the requirements 
document. We came to the conclusion that  sampling may be applied at any 
place in the sequence. Therefore I also think that we should not fix the 
sequence in which filtering and sampling is done in PSAMP.

Regards
Tanja


--
Dipl.-Ing. Tanja Zseby			    	      	
FhI FOKUS/Global Networking			Email: zseby@fokus.fhg.de	
Kaiserin-Augusta-Allee 31				Phone: +49-30-3463-7153
D-10589 Berlin, Germany				Fax:   +49-30-3463-8153
-------------------------------------------------------------------------------------- 
"Living on earth is expensive but it includes a free trip around the sun." (Anonymous)
--------------------------------------------------------------------------------------





--
to unsubscribe send a message to psamp-request@ops.ietf.org with
the word 'unsubscribe' in a single line as the message text body.
archive: <http://ops.ietf.org/lists/psamp/>